I failed again in the examination and only then _____ how much time I had wasted.
| A．I realized | B．I had realized | C．did I realize | D．had I realized |
—Can I get you a cup of tea?
—________.
| A．That’s very nice of you | B．With pleasure |
| C．You can, please | D．Thank you for the tea |
David dislikes television heroes who smoke, __________?
| A．do they | B．don’t they |
| C．doesn’t he | D．does he |
— I was hoping you were able to lend me the money.
— __________________
| A．That’s right! | B．You can forget that! |
| C．You are welcome. | D．Never mind. |
It is only with the help of scientific research _____ bring PM1 air pollution under control.
| A．that we will | B．we will |
| C．that we do | D．do we |
When travelling in America, we stayed in a quiet hotel, __________.
| A．next to it was a thick wood |
| B．next to which was a thick wood. |
| C．next to it there was a thick wood |
| D．next to which a thick wood was |